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$81+ Cheap flights from South Dakota to Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
FSD — ORD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find flight deals from South Dakota to Illinois

Cheapest flights from South Dakota to Illinois
Explore the most affordable flight options available from South Dakota to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Priceline deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/132:13 pmFSD - ORD
1 stop10h 02mFrontier
Thu 12/47:00 amORD - FSD
1 stop6h 31mFrontier
Deal found 10/29$130
This Frontier deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/132:13 pmFSD - ORD
1 stop10h 02mFrontier
Sun 12/77:00 amORD - FSD
1 stop6h 31mFrontier
Deal found 10/29$143
This Mytrip deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/102:32 pmFSD - STL
1 stop18h 35mFrontier
Thu 11/137:45 pmSTL - FSD
1 stop17h 57mFrontier
Deal found 10/30$159
This Frontier deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/142:27 pmFSD - ORD
1 stop9h 48mFrontier
Thu 12/47:00 amORD - FSD
1 stop6h 31mFrontier
Deal found 10/29$163
This Frontier deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/142:27 pmFSD - ORD
1 stop9h 48mFrontier
Sun 12/77:00 amORD - FSD
1 stop6h 31mFrontier
Deal found 10/29$176
This Priceline deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/162:18 pmFSD - ORD
1 stop9h 57mFrontier
Mon 11/176:00 amORD - FSD
1 stop7h 47mFrontier
Deal found 10/29$183
This United Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:08 pmFSD - ORD
Nonstop1h 57mUnited Airlines
Sat 12/612:45 pmORD - FSD
Nonstop1h 55mUnited Airlines
Deal found 10/29$189
This American Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/142:02 pmFSD - ORD
Nonstop1h 56mAmerican Airlines
Sun 12/218:15 amORD - FSD
Nonstop2h 01mAmerican Airlines
Deal found 10/30$190
This Priceline deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/142:27 pmFSD - ORD
1 stop9h 48mFrontier
Sun 11/166:00 amORD - FSD
1 stop7h 33mFrontier
Deal found 10/29$196
This Kiwi.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/172:32 pmFSD - ORD
2 stops10h 17mFrontier
Thu 12/47:00 amORD - FSD
1 stop6h 31mFrontier
Deal found 10/29$199
This United Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:23 pmFSD - ORD
Nonstop1h 57mUnited Airlines
Thu 12/48:04 pmORD - FSD
Nonstop1h 47mUnited Airlines
Deal found 10/29$204
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/35:14 amFSD - MDW
1 stop4h 05mDelta
Sat 12/61:50 pmMDW - FSD
1 stop5h 50mDelta
Deal found 10/28$209

Cheap flight deals from South Dakota to Illinois

Keep the following information in mind while searching for South Dakota to Illinois flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$130
(Priceline)

One-way from

$81
(Priceline)

Popular in

March

Cheapest in

September

Average price

$308

Good round-trip deal

$328 or less

Good one-way deal

$245 or less
Provider with most accurate pricing for Sioux Falls Joe Foss Field-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sioux Falls Joe Foss Field-Chicago (CHI) flights.
Search Deals
From South Dakota to Illinois
Search Deals
One-way flight from South Dakota to Illinois
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($11 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from South Dakota to Illinois.
Search Deals
Price to beat on a one-way flight from South Dakota to Illinois.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from South Dakota to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from South Dakota to Illinois that are best for you.

Fly from

South Dakota

Fly to

Illinois

Route

Depart

Return

Price

Sioux FallsSt. Louis

FSD - STL

FSDSTL

Sioux Falls Joe Foss Field

Mon 11/10

2:32 pm-9:07 am

1 stop18h 35m

Lambert-St Louis

Thu 11/13

7:45 pm-1:42 pm

1 stop17h 57m

$159

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Fri 11/21

6:23 pm-8:20 pm

Nonstop1h 57m

Chicago O'Hare Intl

Sat 12/6

8:48 am-10:45 am

Nonstop1h 57m

$189

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Thu 12/4

6:08 pm-8:05 pm

Nonstop1h 57m

Chicago O'Hare Intl

Sat 12/6

12:45 pm-2:40 pm

Nonstop1h 55m

$189

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Wed 12/3

8:00 am-9:53 am

Nonstop1h 53m

Chicago O'Hare Intl

Sat 12/13

8:04 pm-9:51 pm

Nonstop1h 47m

$189

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Thu 12/4

8:00 am-9:54 am

Nonstop1h 54m

Chicago O'Hare Intl

Mon 12/8

8:04 pm-9:50 pm

Nonstop1h 46m

$189

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Wed 11/26

6:23 pm-8:20 pm

Nonstop1h 57m

Chicago O'Hare Intl

Wed 12/3

8:48 am-10:45 am

Nonstop1h 57m

$189

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Fri 2/6

7:30 am-9:32 am

Nonstop2h 02m

Chicago O'Hare Intl

Mon 2/9

7:58 pm-9:50 pm

Nonstop1h 52m

$189

Sioux FallsChicago

FSD - ORD

FSDORD

Sioux Falls Joe Foss Field

Thu 11/13

6:23 pm-8:20 pm

Nonstop1h 57m

Chicago O'Hare Intl

Thu 12/4

8:04 pm-9:51 pm

Nonstop1h 47m

$204

Sioux FallsChicago

FSD - MDW

FSDMDW

Sioux Falls Joe Foss Field

Fri 12/5

5:14 am-9:19 am

1 stop4h 05m

Chicago Midway

Sun 12/7

7:02 pm-11:12 pm

1 stop4h 10m

$209

Sioux FallsChicago

FSD - MDW

FSDMDW

Sioux Falls Joe Foss Field

Wed 12/3

5:14 am-9:19 am

1 stop4h 05m

Chicago Midway

Sat 12/6

1:50 pm-7:40 pm

1 stop5h 50m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 60 results
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Best time to book a flight from South Dakota to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from South Dakota with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from South Dakota to Illinois

What is the cheapest month to book a flight from South Dakota to Illinois?

Currently, March is the cheapest month in which you can book a flight from South Dakota to Illinois (average of $187). Flying from South Dakota to Illinois in June is currently the most expensive (average of $224). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SD to IL?

Find hourly flight availability from South Dakota to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

It’s typically best to fly out from South Dakota to Illinois in the evening. Doing so could potentially save you 51% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from South Dakota to Illinois?

Use this chart to determine the cheapest time to fly round-trip from South Dakota to Illinois. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their South Dakota to Illinois flight should consider departing on Monday mornings when fares are most often at their lowest. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from South Dakota to Illinois?

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated October 30, 2025.
Read through reviews of airlines operating flights from South Dakota to Illinois, such as Denver Air Connection, Delta, and United Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Denver Air Connection
8.7
Very good

Overall

8.7

Boarding

8.7

Food

8.4

Crew

9.4

Entertainment

8.1

Comfort

8.9
Denver Air Connection
8.7
Very good
Denver Air Connection
8.7
Very good

Overall

8.7

Boarding

8.7

Food

8.4

Crew

9.4

Entertainment

8.1

Comfort

8.9
Delta
7.9
Good
7,998 reviews
Denver Air Connection
8.7
Very good

Overall

8.7

Boarding

8.7

Food

8.4

Crew

9.4

Entertainment

8.1

Comfort

8.9
United Airlines
7.4
Good
8,998 reviews
Denver Air Connection
8.7
Very good

Overall

8.7

Boarding

8.7

Food

8.4

Crew

9.4

Entertainment

8.1

Comfort

8.9
American Airlines
7.2
Good
11,034 reviews
Denver Air Connection
8.7
Very good

Overall

8.7

Boarding

8.7

Food

8.4

Crew

9.4

Entertainment

8.1

Comfort

8.9

Related info for your journey

Find useful and relevant information for your journey from South Dakota to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from South Dakota to Illinois?

    Airlines like Frontier, United Airlines, and Delta fly from South Dakota to Illinois in about 1h 57m. The time it takes to get you to your destination can typically vary by up to 16h 38m. Airlines will cover a distance of 461 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from South Dakota to Illinois one-way?

    One-way options have recently been found by users for as low as $105 on Frontier. Other airlines that offer cheap prices include Delta from $170 and United Airlines from $176 one-way.

  • Can I find deals for flights from South Dakota to Illinois that include hotel bookings?

    Yes. In addition to deals on South Dakota to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from South Dakota to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from South Dakota to Illinois.

  • Can I find deals for business class flights from South Dakota to Illinois?

    Yes. Cheapflights offers flight deals from South Dakota to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from South Dakota to Illinois?

    Currently, March is the cheapest month in which you can book a flight from South Dakota to Illinois (average of $187). Flying from South Dakota to Illinois in June is currently the most expensive (average of $224). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 4 airlines flying from South Dakota to Illinois

Discover the top 4 airlines that operate flights from South Dakota to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Denver Air ConnectionCheapest$178Average$194FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$189Average$225FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$189Average$325FlexibilityNo cancel feeOn-time69%
DeltaCheapest$208Average$311FlexibilityNo cancel feeOn-timeN/A

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